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Thread: help required in ultrasonic motion sensing project

  1. #1

    Default help required in ultrasonic motion sensing project

    hey frenz... m in ma 6th sem right now ... doing ECE... n as a part of our mini project we were planning to create an ultrasonic motion sensing device ...i got the project from the net ... the link is ... http://web-ee.com/images/UltrasonicMotionDetector.pdf ... the prob is ... the 40khz ultrasonic transducer pair n the 40 khz crystal is hard to obtain in india... ive been mailing various firms outside india asking if these 2 components r available .... but all my efforts ended up in vain .... can ne1 pls suggest from where i can get the above 2 components ???

  2. #2

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    u can get those components from nex-robotics.com

    triindia.co.in..
    robokits.org

  3. #3

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    Quote Originally Posted by superchiku
    u can get those components from nex-robotics.com

    triindia.co.in..
    robokits.org
    thanx a lot for the above sites... but i still din have ne luck in getting the 40khz crystal... vthout the 40khz crystal i dun think the above project is possible... is 40khz crystal really hard to get in india ? even googling 40khz crystal din end up in ne firm which wud provide me one... pls help

  4. #4

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    buy the available ping sensors...ultrasonic range finders...u dont need the crystals then. .

  5. #5
    Member Advanced User rahuljin's Avatar
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    Default

    there is no 40khz crystall available. use a 555ic to generate a 40khz pulse for the ultrasonic transducer.

  6. #6

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    u dont need to do all these things just buy one ultrasonic ping sensor that will be enough.. .

  7. #7

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    Quote Originally Posted by superchiku
    u dont need to do all these things just buy one ultrasonic ping sensor that will be enough.. .
    hey ...thanx again buddy ... but can u temme more abt the ultrasonic ping sensor ??? if im using the ping sensor then the transmitting n receiving section as shown in the diagram shud be changed ???

  8. #8

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    yes but now the ultrasonic ping sensor will give out distance measurements in terms of analog voltage ...u can use a microcontroller to measure this volltage and then do the required job if the object detected is under a specific distance. ..

  9. #9

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    Quote Originally Posted by superchiku
    yes but now the ultrasonic ping sensor will give out distance measurements in terms of analog voltage ...u can use a microcontroller to measure this volltage and then do the required job if the object detected is under a specific distance. ..
    thanx a lot buddy ... will let u know abt the details... btw ... which software wud u suggest for simulation ???

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